发个小程序希望有人需要操作摄像头

1、using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.Runtime.InteropServices;namespace WindowsFormsApplication24 public partial class Form1 : Form public Form1() In

2、itializeComponent(); const short WM_CAP = 1024; const int WM_CAP_DRIVER_CONNECT = WM_CAP + 10; const int WM_CAP_DRIVER_DISCONNECT = WM_CAP + 11; const int WM_CAP_EDIT_COPY = WM_CAP + 30; const int WM_CAP_SET_PREVIEW = WM_CAP + 50; const int WM_CAP_SET_PREVIEWRATE = WM_CAP + 52; const int WM_CAP_SET_

3、SCALE = WM_CAP + 53; const int WS_CHILD = 1073741824; const int WS_VISIBLE = 268435456; const short SWP_NOMOVE = 2; const short SWP_NOSIZE = 1; const short SWP_NOZORDER = 4; const short HWND_BOTTOM = 1; int iDevice = 0; int hHwnd; System.Runtime.InteropServices.DllImport("user32", EntryPoi

4、nt = "SendMessageA") static extern int SendMessage(int hwnd, int wMsg, int wParam, MarshalAs(UnmanagedType.AsAny) object lParam); System.Runtime.InteropServices.DllImport("user32", EntryPoint = "SetWindowPos") static extern int SetWindowPos(int hwnd, int hWndInsertAfter

5、, int x, int y, int cx, int cy, int wFlags); System.Runtime.InteropServices.DllImport("user32") static extern bool DestroyWindow(int hndw); System.Runtime.InteropServices.DllImport("avicap32.dll") static extern int capCreateCaptureWindowA(string lpszWindowName, int dwStyle, int x

6、, int y, int nWidth, short nHeight, int hWndParent, int nID); System.Runtime.InteropServices.DllImport("avicap32.dll") static extern bool capGetDriverDescriptionA(short wDriver, string lpszName, int cbName, string lpszVer, int cbVer); private void OpenPreviewWindow() int iHeight = 320; int

7、 iWidth = 200; / / Open Preview window in picturebox / hHwnd = capCreateCaptureWindowA(iDevice.ToString(), (WS_VISIBLE | WS_CHILD), 0, 0, 640, 480, picCapture.Handle.ToInt32(), 0); / / Connect to device / if (SendMessage(hHwnd, WM_CAP_DRIVER_CONNECT, iDevice, 0) = 1) / / Set the preview scale / Send

8、Message(hHwnd, WM_CAP_SET_SCALE, 1, 0); / / Set the preview rate in milliseconds / SendMessage(hHwnd, WM_CAP_SET_PREVIEWRATE, 66, 0); / / Start previewing the image from the camera / SendMessage(hHwnd, WM_CAP_SET_PREVIEW, 1, 0); / / Resize window to fit in picturebox / SetWindowPos(hHwnd, HWND_BOTTO

9、M, 0, 0, iWidth, iHeight, (SWP_NOMOVE | SWP_NOZORDER); else / / Error connecting to device close window / DestroyWindow(hHwnd); private void ClosePreviewWindow() / / Disconnect from device / SendMessage(hHwnd, WM_CAP_DRIVER_DISCONNECT, iDevice, 0); / / close window / DestroyWindow(hHwnd); private vo

10、id button1_Click(object sender, EventArgs e) iDevice = int.Parse(device_number_textBox.Text); OpenPreviewWindow(); C# code using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;u

11、sing System.Runtime.InteropServices;namespace WindowsFormsApplication24 public partial class Form1 : Form public Form1() InitializeComponent(); const short WM_CAP = 1024; const int WM_CAP_DRIVER_CONNECT = WM_CAP + 10; const int WM_CAP_DRIVER_DISCONNECT = WM_CAP + 11; const int WM_CAP_EDIT_COPY = WM_

12、CAP + 30; const int WM_CAP_SET_PREVIEW = WM_CAP + 50; const int WM_CAP_SET_PREVIEWRATE = WM_CAP + 52; const int WM_CAP_SET_SCALE = WM_CAP + 53; const int WS_CHILD = 1073741824; const int WS_VISIBLE = 268435456; const short SWP_NOMOVE = 2; const short SWP_NOSIZE = 1; const short SWP_NOZORDER = 4; con

13、st short HWND_BOTTOM = 1; int iDevice = 0; int hHwnd; System.Runtime.InteropServices.DllImport("user32", EntryPoint = "SendMessageA") static extern int SendMessage(int hwnd, int wMsg, int wParam, MarshalAs(UnmanagedType.AsAny) object lParam); System.Runtime.InteropServices.DllImp

14、ort("user32", EntryPoint = "SetWindowPos") static extern int SetWindowPos(int hwnd, int hWndInsertAfter, int x, int y, int cx, int cy, int wFlags); System.Runtime.InteropServices.DllImport("user32") static extern bool DestroyWindow(int hndw); System.Runtime.InteropServi

15、ces.DllImport("avicap32.dll") static extern int capCreateCaptureWindowA(string lpszWindowName, int dwStyle, int x, int y, int nWidth, short nHeight, int hWndParent, int nID); System.Runtime.InteropServices.DllImport("avicap32.dll") static extern bool capGetDriverDescriptionA(shor

16、t wDriver, string lpszName, int cbName, string lpszVer, int cbVer); private void OpenPreviewWindow() int iHeight = 320; int iWidth = 200; / / Open Preview window in picturebox / hHwnd = capCreateCaptureWindowA(iDevice.ToString(), (WS_VISIBLE | WS_CHILD), 0, 0, 640, 480, picCapture.Handle.ToInt32(),

17、0); / / Connect to device / if (SendMessage(hHwnd, WM_CAP_DRIVER_CONNECT, iDevice, 0) = 1) / / Set the preview scale / SendMessage(hHwnd, WM_CAP_SET_SCALE, 1, 0); / / Set the preview rate in milliseconds / SendMessage(hHwnd, WM_CAP_SET_PREVIEWRATE, 66, 0); / / Start previewing the image from the cam

18、era / SendMessage(hHwnd, WM_CAP_SET_PREVIEW, 1, 0); / / Resize window to fit in picturebox / SetWindowPos(hHwnd, HWND_BOTTOM, 0, 0, iWidth, iHeight, (SWP_NOMOVE | SWP_NOZORDER); else / / Error connecting to device close window / DestroyWindow(hHwnd); private void ClosePreviewWindow() / / Disconnect from device / Send